Based on the assembled picture - that looks normal. When the spring gets jammed in the frame the rod is pushed out further.
I'll be honest, I'm a little stumped right now and that's not normal. Just confirming my understanding:
1. Brand new gun - have you fired any rounds through it?
2. Did the slide function normally before field stripping?
3. Field strip only - removed slide, RSA and barrel to clean. Then reassembled.
4. No issues with reassembly or disassembling/reassembling now
5. Everything looks normal when reassembled - but slide will not move far enough to the rear for the slide stop lever to be engaged
A couple of things you can check but they are long shots with a new gun:
1. Take the slide off and remove the barrel. Stand the slide (on a flat surface) on its nose. The slide and guide rod ring should be flat against the surface - you are checking to ensure the guide rod ring hasn't been bent from a drop. Based on the pic you posted, this looks normal but won't hurt to check.
2. Take the barrel and slide down through the opening in the slide - it should be able to travel all the way without binding. The fit with a Gen5 is a little bit tighter but as long as the barrel is straight, it should fit all the way. This is checking for a bulge in the barrel that could bind the slide. Again, a very long shot on a new gun.